Locomotive boiler



May 26, 1.931.

B. E. LARSON LOcoMoTIVE BOILER- Filed Aug. 17. 1929 @www Patented May 26, 1931 fUNI'rso vsrxrls PATENT OFFICE BERTvE. LARSON, OF PARK RIDGE, ILLINOIS, ASSIGNOR TOLOCOMOTIVE FIREBOX COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE,

LocoMo'rIvn BoILEn Applicationy led August 17, 1929. Serial No'. 386,659.

This invention relates to improvements in locomotive boilers and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

Theprimary object of the invention is to provide in a thermic siphon equipped boiler of this kind, a simple and an' improved connectionbetween the Vinlet neck of the si` phon and associated part of the boiler whereby said neck may shift to accommodate itself to the movement of the siphon due to changes in temperature conditions.

The above mentioned lobject of the invention as well as others, together with the many advantagesthereof will more fully appear as I proceed with my specification.

In the drawings v Y Fig. 1 is a longitudinal vertical Asectional view through the front throat portions of la locomotive boiler and adjacent parts embody ing the preferred form of my invention.

Fig. 2 is a transverse vertical sectional view hrough the same as taken on the line 2 of iff. 1. l yIbeferring `no-w in detail to that embodiment of the invention illustrated in the accompanying drawings, 1 indicates as a whole the bottom portionV of the shell 'of a locomotive boiler, `2 indicates the outside front throat sheet associated therewith and 3 indicates the inside Vfrontthroat sheet defining a part of the irebox-4.V The bottom portions ofthethroat sheets 2 and'3iare connected together by a part of the mud ring 5 t'oprovide the front throat or water leg 6. The iirebox includes a combustion chamber .7 the bottomy that the front throat or leg is in communica`` f tion with the boiler. water space of theboiler beneath the combustion chamber.

Where .additional elements are 'employed in the combustion chamber 7 for increasing the water steaming and circulating efficiency the boiler. In this respect it is pointed out that owing to the fact that such'siphons are rigidly fixed atv one end in the crown sheet and are subjected to varying temperatures, they take on a movement relative to the parts ofthe. boiler and firebox in which their oppositeends are connected. To accommodate such movement I have provided a structure associated with the tubular inlet end of the siphon whereby such movement is permitted 1n the plane of and parallel with the axis of said neck and this without leakage.

11 indicates the substantially, perpendicularly disposed tubular inlet neck of a Siphon which extends down through but out of engagement witha sleeve 12, secured at its ends in the shell 1 andv bottom wall 8 of the combustion chamber. The inlet neck 1 1 extends into a plane below that of the bottom end of the sleeveA 12 and there has secured to it a collar llaof metal unaffected by immersion in water.' close the bottom end of said neck is a longi-v tudinally extending cup shaped well mem`` ber 13. Said member includes a bottom wall Secured to the shell 1 so as-to en-f tom surface of the boiler shell 1,'within the Y well member 13 and coaxially with respect to the sleeve 12,*is a plate 18 which includes a depending annular flange 19 and an inwardly extending radial flange or shoulder 20 de# fining a recess 21 in said plate. In the bottom wall 14 of the well `member 13, coaxially of the inlet neck end is an opening 22 normally closed by cover plate 23 fixed to said bottom wall preferably as by the rivets as shown.

A gasket 24 is provided between said bottom wall 14 and said cover plate to provide a tight joint therebetween. In said cover is also provided a washout plug 25.

In the recess 21 of the annular plate 18 is located a packing comprising coacting compressible packing rings 26 each surrounded by a contractile device 27 in the form of a helcially coiled spring. 28 indicates a helical expansion spring which engages at one end against the bottommost packing ring 26-and engages at its other end against the cover plate 23, the latter having legs 29 disposed inside the spring 2S to secure it against undue lateral movement.

As is apparent from the drawings, the spring 28 acts to hold the packing as provided by the rings Q6, snugly up against the annular shoulder 2O and the springs 27 acts to contract said rings 26 about the collar 11a in a manner providing a tight joint therebetween but one which will permit of a slip movement ofsaid collar without leakage.

`Thus as the neck 11 moves 'longitudinally under the action produced by temperature changes, the collar 11ZL slides through the packing and as the packing rings have an inwardly contractingaction upon said sleeve because of the springs 27 and are urged into a. tight engagement against the shoulder 20, it is, apparent that water cannot leak upwardly about the sleeve and through the packing. y

Water from the boiler shell enters the well member 13 and then passes into and up through the neck 11 which having its major portion disposed in the combustion chamber is subjected to the products of combustion therein. The steam evolved therein together with the hot water will rise upwardly due to difference in weight between the water in saidinlet neck and said boiler shell `so that a siphonic action is induced, Icausing an upflow ofwater in said neck where it passes to the body of the associated siphon in the manner well known.

The construction mentioned provides a slip connection for the inlet neck which consists of but a few parts disposed ina manner convenient for cleanout and inspection purposes.

`While in describing my invention I have referred in detail to the form, arrangement and construction of the various parts thereof the same is to be considered merely as illustrative so that I do not wish to be limited thereto except as may be specifically set forth in the appended claims.

I claim as my invention 1A locomotive boiler embodying therein, a boiler shell sheet forming a part of the water space of the boiler, a member secured to said 'sheet and -coacting therewith to form a well, a water circulating elem-ent haifing a tubular end extending through said sheet int-o said well, a collar fixed on said tubular end, means carried by said sheet and providing an annular shoulder in said well and radially spaced from said tubular end, a packing means surrounding said collar with a normal contracting action thereon and engaged against said shoulder and means disposed between said packing and said member for urging the packing against said shoulder.

2. A locomotive boiler embodying therein, a boiler shell sheet forming a part of the water space of said boiler, means fixed to said sheet and providing a well below the same in communication with said water space, a water circulating element having a tubular end extending through said sheet and into said well providing means, a collar fixed on said tubular end, means carried by said sheet in said well and providing an annular shoulder radially spaced from said tubular end, a packing means surrounding said collar with a normal contracting action thereon, and engaged against said shoulder and means disposed between said packing and said well providing means for urging the packing against said shoulder.

3. A locomotive boiler embodying therein a boiler shell sheet forming part of the water space of the boiler, means fixed to said shell sheet and providing a well below the saine in communication with said boiler water space, a water circulating member having a 'tubular end extending through said shell sheet and into said well, a collar fixed on said tubular-end, an annular plate fixed to said sheet within the well and providing an annular shoulder spaced radially from said collar, a packing engaged against said shoulder and normally surrounding said collar with a con'- tracting action thereon, and spring means disposed between said packing and well providing means and normally urging the packing against said shoulder.

4i VA locomotive boiler embodying therein ashell, a combustion chamber sheet spaced therefrom, a sleeve connecting said shell and sheet respectively, a member fixed to said shell and providing a well below the same, a member having a tubular end extending through said sleeve into said Well, a collar fixed on said tube end, an annular plate fixed to said shell and providing an annular shoulder radially spaced from said collar, a packing engaged against said shoulder and surrounding said collar with a normal contracting action thereon, and a spring means disposed between said packing and well providing member and normally urging the packing against said shoulder.

5. A locomotive boiler embodying therein, a shell, a combustion chamber sheet spaced therefrom, a sleeve connecting said shell and sheet respectively, member fixed to said shell and providing a well below the same, a member having a tubular end extending through said sleeve into said Well, a collar fixed on said tube end, an annular plate fixed to said shell and providing an annular shoul- `der radially spaced from said collar, a packing engaging against said shoulder and surrounding said collar with a normal contracting action thereon, a removable cover in said Well providing member, vand a spring means disposed between said packing and said cover and normally urging the packing against said shoulder.

In testimony whereof, I have hereunto set my hand, this 13th day of August, 1929.

BERT E. LARSON. 

